DE2902145A1 - CARTRIDGE SLEEVE - Google Patents

Description

- 4 - Patent attorney Dlpl.-Ing. E. Eder DIpl.-Jng. K. Schieschkö

a Munich 40, Elisabethstrasse 34

ULTRAFIN, SA
SAN JOSE (Costa Rica)

CARTRIDGE CASE

The invention relates to a cartridge case. There are already cartridge cases consisting of a tube Plastic and a floor with an outer covering of metallic parts made of brass or similar material (DT-PS 1,960,355, US-PS 3,246,603). The sleeves are provided with an external metallic reinforcement. These Art sleeves have the disadvantage of oxidizing the reinforced metal parts, so that destruction is inevitable.

These cartridge cases require their external dimensions to be recalibrated after each firing in order to match the dimensions to adjust to the original dimensions again.

Furthermore, cartridge cases are known which consist only of plastic or a mixture of materials without any metallic ones Reinforcement (US-PS 3 4 24 089, US-PS 4 0 20 763, GB-PS 1 096 658). This avoids oxidation, combined with an improvement in accuracy and the charging process, but when used in auto-

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matic rifles disadvantages exist. So that is Use of these sleeves is limited in practice and it results when you press the cartridge pressure holder on the Bullet-sod deformations. These difficulties are particularly present when unloading the weapon due to the influence of the retainer on the outer periphery of the floor of the projectile, which can lead to this peripheral part being torn out and other damage.

Also, when reloading the sleeve, the seat of the Priming capsule suffer permanent deformations, which requires a very careful installation of this capsule, absolutely an undesired escape of gas is to be prevented.

The object of the present invention is to provide a To create cartridge case of the type mentioned, which avoids the aforementioned disadvantages, can be produced quickly and cheaply is not subject to oxidation and, on the other hand, maintains exact dimensions.

This object is achieved according to the invention in that an outer plastic pipe is present, on which on one At the end of at least one further part is arranged, the parts being joined together to form a unit by injection of plastic are. This advantageously results in a cartridge case, predominantly without a metallic component in connection with the outer periphery and with minimal contact surfaces, which in no case the risk of oxidation entail. The shooting conditions are improved and the unloading difficulties are avoided. Simultaneously Recalibration and adjustment of the primer is no longer necessary.

Furthermore, the cartridge case according to the invention is designed to be environmentally friendly. The sleeve also has a structural one

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Reinforcement, especially on the circumference of the floor and consequently on the pull-out ring, which they can easily accommodate Makes a wide variety of weapons usable.

Another advantage of the cartridge case according to the invention is that it is reinforced and predominantly made of plastic material is coated and has a very high accuracy. The primer experiences very good guidance.

An outer tube is mainly used to create a cartridge case with the aforementioned properties Plastic, one end of which subsequently accommodates the composition of the bottom of the case. This compilation includes the ring edge of the pipe end, a circular area which exceeds the diameter of the aforementioned pipe, the outer base of the projectile and its inner part within the barrel, at the same time as one centered area for attaching the primer.

This combination consists essentially of a cylindrical inner part made of plastic or another Material, the basis of the soil, a part whose outer diameter is smaller than the inner diameter of the pipe and whose side facing the load can have any shape, the outer surface being smooth. This Part is attached at a certain distance from another part, which consists of three differentiated zones: One zone is visibly smooth and round at a certain distance and parallel to the outer surface of the inner cylindrical Part; another zone is arranged centrally and polygonal, which crosses the middle of the first zone towards the bottom and an opening of the inner part forms ^ crosses the third zone the circular ends of the first zone up to a diameter which exceeds the outer diameter of the pipe

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tet, wherein the diameter forming a projection forms part of that side which is opposite to that occupied by the tube lies.

It should be emphasized in this connection that the pipe does not have direct contact with the inner part like this is the case with the metallic part, with only a temporary support being present. All three parts are separated by empty spaces into which the plastic compound is later introduced.

The metallic part has a number of evenly in its plane distributed openings penetrating the part. The prismatic zone can be triangular, square or in shape be polygonal.

When all three parts, namely the tube, the inner part and the metal part, are joined together in the aforementioned manner liquid plastic is filled in, which fills the gaps, with the following gaps:

- The space between the inner surface of the pipe and the side surface of the interior,

- the space between the metal part and the outside of the cylindrical inner part,

- the space between the outer wall of the prismatic zone of the Metal part and the central perforated part of the inner part,

-the space above the top face of the pipe between this and the metal part,

- the side space of the protruding part to a greater extent than this part,

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- the space above the protruding part,

- the space above the smooth round surface of the metal part,

- the space that passes through the holes in the smooth surface

of the metal part is formed,

- the space adjoining the interior of the prismatic zone of the metal part,

- as well as the space between the base of the prismatic zone of the metal part and part of the area through the hole of the inner part.

The liquid plastic therefore completely covers the metal part, at the same time enclosing the exterior of the inner part as well as its opening and its interior. Since the protruding The area of the metal part has a larger diameter than the outer diameter of the pipe, forms the plastic compound, which surrounds this projection, together with this the so-called pull-out ring.

The upper free end of the projection, which clearly appears in a round shape, is the reference point for the largest Height which the welding compound can reach when hardening · This height should preferably be slightly higher than the above upper end. At the same time, the weld mass should not have too great a strength between the outer edge of the projection and the exterior of the ring.

The pull-out ring is therefore essentially defined by an inner metal part completely covered with the plastic compound, which separates it in every external contact. That the upper free end of the protruding part corresponds perfectly to the range of action of the holding needle of automatic rifles, while the lower end of this zone is in the area of effect

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the retraction needle is lying.

The prismatic central area of the metal part, designed in the form of an equilateral triangle, square or The main characteristic of polygons is the task of directing the tool to introduce the final Plastic compound. It should be noted that the prismatic zone and the introduced one form a regular square Tool that comes into contact with the inner walls of the surface of the prismatic zone, in the sense of the vertical Longitudinal axes of this surface is round. During the injection and the subsequent removal of the tool vertical lines result which are not covered with plastic. They serve as a guide for the cylindrical Exterior of the primer and for centering. At the same time it is provided that the theoretical circle, which in the section the prismatic zone, has a slightly smaller diameter than the outer diameter of the primer, whereby, in addition to proper guidance, pressure is exerted on this detonator. This pressure holds the primer in place in the aforementioned tour. At the same time, the vertices serve as a guide in the section of the prismatic zone Introducing the metal part in the middle part of the floor or in the inner part.

It should also be noted that there are more for the primer Management areas exist. These areas form the spaces between the vertices of the polygon of the prismatic Zone of the metal part as well as the capsule itself. Furthermore, areas which are filled with plastic material which exerts pressure on the capsule and forms a hermetic seal that prevents gases from escaping prevented.

The holes to be drilled on the inner metal part should preferably not to be deburred in addition to their

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Purpose of the introduction of the liquid plastic during the injection as anchoring of the metal part in the solidified To serve plastic mass.

The thickness of the metal part can be any, both evenly as well as differently in the area of the different zones. The selected material has a corresponding Moment of resistance. The shape of the metal part can be any. Furthermore, it is also possible to use the inner part to connect with the outer plastic part and the metal part accordingly.

If lower requirements are placed on the cartridge case, in this way the upper end of the projection or other zones can directly enter the exterior through the area of the projectile fairway arrive without a covering with plastic compound is required. In this case the possible oxidation is limited on these contact zones, the other metal parts are excluded, so that avoidance of a further result Oxidation the sleeve can be used again. There is also the option of the inner surface on the cargo side of the bottom piece made of metal, like this one To cover the area efcenfallsknit injected plastic.

The invention is illustrated below with reference to the drawing Embodiments described in more detail. In the drawing show:

1 shows a side view of the cartridge case, partly broken;

FIG. 2 shows the section along the line AA ¹ in FIG. 1;

Fig. 3 shows a section along the line B-B 'in Fig. 1;

4 shows an enlarged detail of the metal part;

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- 11 Pig. 5 shows the plan view of the part according to FIG. 4;

6 is an enlarged view of the openings of the metal part ;

7 shows a detail with the capsule inserted in the prismatic opening of the metal part;

Fig. 8 is an enlarged view of the center of the part according to Fig. 2;

9 shows a schematic view when the injection molding tool is inserted in the prismatic area of the metal part and the primer;

Figures 10 and 11

various design options for the area of the metal part;

Fig. 12 shows another embodiment of the invention Cartridge case;

13 shows a further possible embodiment of the cartridge case according to the invention;

Figs. 14, 15, 16 and 17

further design options for the metal part;

Figs. 18, 19, 20 and 21

different arrangements of the surface and the free side of the projection in connection with the free surface of the injection compound after solidification;

22 shows a possibility of supporting the metal part;

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Pig. 23 another embodiment of the arrangement of the protruding part area;

24 shows a further embodiment of the invention Cartridge case.

According to Fig. 1, an inner cylindrical part 3 is arranged in the tube 1 made of plastic material, which also can be made of plastic material. This part 3 has a smaller diameter than the tube 1 and is in a certain distance to these attached. The part 3 is pierced in its middle part and contains a gradation 22, which is shown in more detail in FIG. 12, for example.

A metal part 4 is arranged over the cylindrical part 3 in such a way that there is a certain distance is. This metal part 4 has a protruding zone 5 which exceeds the outer diameter of the tube 1. Farther a prismatic part 7 of the metal part 4 is inserted into the opening 17, on the shoulder 22 in a stable position, so that a favorable support surface 25 according to Fig. 1 and Fig. 22 results.

A plastic compound 2 fills all of the aforementioned parts and flows into the openings 6 of the metal part 4 as a result corresponding spaces. The metal part 4 is completely surrounded by the plastic compound 2, which at the same time Inner part 3 recorded.

The upper end of the protruding part 5 of the metal part 4 reaches the vicinity of the surfaces 9 of the sleeve below one circular part 19 of this surface. A space filled with welding compound results between the aforementioned End and part 19, exactly in the area in which the holding needle of automatic rifles will later be effective.

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In Fig. 7 the arrangement of the primer 31 in the interior of the opening of the prismatic part 7 of the metal part 4 is shown as well as the aforementioned contact and pressure points 24. In connection with the representations in FIGS. 2, 8 and 9 it can be seen like the injection compound or welding compound the inside and the exterior of part 7 is covered, with the exception of the small guide points 24 for the primer 31.

The shape of the circular surface of the upper end of the protruding part 5 or its position in relation to the horizontal arrangement can be variable and adapted to the individual requirements in practice. Different Embodiments are shown in FIGS. 18, 19 and 20. To 18, the surface 11 is inclined obliquely upwards. This results in a minimum distance between zone 19 and the protruding area of the part 4. According to FIG. 19, the inclination of the surface 12 is directed in the opposite direction, whereby a Distance 15 to the area 19 results. According to FIG. 20, the surface 13 is exactly horizontal, with a spacing 16.

There is also the possibility of adapting the inner metal part to the different shapes. In this context, will refer to FIGS. 14, 15, 16 and 17. According to Fig. 14, the metal part 4 forms an arc, the cross section of which corresponds to the protruding Part corresponds to a small horizontal part which lies parallel to the surface 9.

Another possible embodiment is shown in FIG. 15, after which the metal part 4 has a small cylindrical portion 23, within the lateral space, the is limited by the pipe 1 and the inner piece 3.

Another embodiment is shown in Fig. 16, in which the horizontal zone of the part is above the inner part 3 is interrupted, similar to FIG. 17, in which the horizontal part is cut into its incision 18 of part 3.

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is oily. According to FIG. 13, there is also another possibility given to the cartridge case. Inside the plastic pipe only a part 4 is provided, which consists of metal, the thickness of which is sufficient to enable the welding compound to be injected. Also in Fig. 24 is another possible implementation is shown.

When designing the area 7 of the part 4, polygonal shapes are used and in this context it is referred to Figures 4, 5, 9, 10, 11 referenced. The welding compound covers the vertices of the triangle 7 (intersection of the prismatic zone), leaving free the vertical lines of the surface of this prismatic zone, shown in this section through the points 24, which serve to guide the primer and press it when it is later introduced into the Opening 17 of the sleeve.

According to FIG. 8, the edges 28 form the outer points of the square 7 as guides on the inside of the wall 29 of the inner part as a bottom 3 with the purpose of facilitating the attachment of the metal part 4 on the part 3 and contact surfaces 24 to create for the introduction and holding of the primer.

Patent attorneys

Dipl.-Ing. E. Eder Dipl.-Ing. K. Schieschke

8 Munich 40, Ellsabeth «Strasse 34

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Claims (8)

2902 H5 Dipl.-Ing. E. Eder ΟΙρί.-Ing. K. Schieschke Munich IQ, Süsnhethstrasse 34 ULTRAPIN, SoA. SAN JOSE (Costa Rica) PATENT CLAIMS 1.) Cartridge case, characterized by an outer plastic tube (1), at which at one end at least one part is arranged, the parts by injection made of plastic (2) are joined together to form a unit » 2. Cartridge case according to claim 1, characterized in that an inner part inside the plastic tube (1) made of plastic is arranged, which represents a substantial part of the case base in a cylindrical shape, that on the inner part a circular metal part (4) is attached with a larger outer diameter than the outer diameter of the plastic pipe (1), which is supported with a central protruding section on a small circular projection of the base of the Has bottom piece and a prismatic, straight opening which occupies the corresponding opening of the bottom part and with the outer edge comes into contact with said cutout and that this metal part (4) at the same time a circular projection on its outer diameter 030032/0031 -2- 2902 U 5 has and a series of evenly distributed openings in the area between this projection and the outstanding prismatic zone. 3. cartridge case according to claim 1 and 2, characterized in that that the injected mass (2) covers the end or the face of the outer plastic pipe, and the space between the inside of the tube and the outside of the bottom part, the area of the protruding part Part (5) of the metal part (4) above, below and to the side of the same, the part above the metal part, the space between the metal part (4) and the floor, the space between the outer prismatic zone of the metal part and central opening of the bottom piece, the space between the inner prismatic zone of the metal part and the cylindrical seat of the primer, the interior of the openings, which penetrates the metal part and the space between the end and the face of the prismatic zone. 4. cartridge case according to claim 2 and 3, characterized in that the portion of the projection together with the injected Plastic compound, which covers it above, below and to the side, the so-called pull-out ring forms. 5. Cartridge case according to one of the preceding claims, characterized in that the bottom piece made of metallic Material is made and the injection compound its exterior including the area on the sides the load is covered. 6. cartridge case according to claim 1 to 5, characterized in that if the bottom piece is omitted, the metal part accordingly Gets strength and shape to adequately seat the space of injection. 030032/0031 2902U5 7. Cartridge case according to one of the preceding claims, characterized in that the upper end of the projection of the metal part runs outwards. 8. cartridge case according to claim 1, 2, 3, 4, 6 and 7 _f, characterized in that the thickness of the metal part is constant over its entirety. 9. cartridge case according to claim 1, 2, 3, 4, 6, and 7, characterized characterized in that the strength of the metal part is over its entirety is changeable. 10. cartridge case according to claim 1 to 4 and 6 to 9, characterized characterized in that the metal part is preferably made of steel. 11. cartridge case according to claim 1 to 3, characterized in that that the prismatic or cylindrical part of the metal part (4) on its inner surfaces some of the injection uncovered, evenly centered lines or points on these surfaces, which the primer (31) as a guide and supports are used, the outer diameter of which is larger than the opening located in the prismatic zone. 12. cartridge case according to claim 1 to 4 and 6 to 11, characterized characterized in that the metal part has reinforced openings has, which serve at the same time for better connection of the injection compound and for the possible removal of the bottom piece. Patent attorneys Dlpl.-Ing. E, Eder Dlp! .- ing. K. Schieschk " 8 Munich 40, Ellsabethetraße34. Q3Q032 / 0031